Last weekend, nina mowed lawns and received $60. This weekend she mowed 6 lawns and received $90. what is the constant of proportionality?

$15

Step-by-step explanation:

It is given that,

Last weekend, Nina mowed 4 lawns and received $60. This weekend she mowed 6 lawns and received $90.

We need to find the constant of proportionality.

First we can find the money received when she mowed 1 lawn for last weekend.

4 lawns = $60

1 lawn = $15

Then, we will find the money received when she mowed 1 lawn for this weekend.

6 lawns = $90

1 lawn = $15

Hence, the constant of proportionalityis $15.